A woman who recently split up with a boyfriend called Aurora police late Saturday to report he had threatened to put pure sodium into the Aurora Reservoir, police said.

Police sent a hazardous materials team to a home along East Fitzsimons Way near Interstate 225 to retrieve about 500 grams of a substance they said the unidentified woman claimed was pure sodium. In its purest form, sodium is a metal that can produce hydrogen gas and heat if in contact with water.

Police said the woman claimed the ex-boyfriend obtained the substance from a hospital where he worked.

In sufficient quantities, pure sodium can cause a fire.

No injuries were reported. Police said the ex-boyfriend was out-of-state. Their investigation continues.

David is a member of the Investigations Team and has been at The Denver Post since 1999. He was a founding member of the team before writing about banking, finance, human services, consumer affairs, and business investigations. He has also worked at newspapers in New York, St. Louis and Detroit over a 35-year career that began at The Post.

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